.TH "USB_MODESWITCH" "1" 
.SH "NAME" 
usb_modeswitch - switch mode of "multi-state" USB devices 
.SH "SYNOPSIS" 
.PP 
\fBusb_modeswitch\fR [\fB-hvpVPmM23rdHn\fP]  [\fB-c \fIfilename\fP]
.SH "DESCRIPTION" 
.PP 
Several new USB devices have their proprietary Windows drivers onboard,
most of them WAN dongles. When plugged in for the first time, they act
like a flash storage and start installing the Windows driver from there.
If the driver is already installed, it makes the storage device disappear
and a new device, mainly composite with modem ports, shows up.
.PP 
On Linux, in most cases the drivers are available as kernel modules,
such as "usbserial" or "option". However, the device shows up as
"usb-storage" by default. \fBusb_modeswitch\fR can send a provided bulk
message (most likely a mass storage command) to the device which is known
to initiate the mode switching.
.PP
In some cases, USB control commands are used for switching. These cases are
handled by custom functions, and no bulk message needs to be provided.
.PP
Usually, the program is distributed with a set of configurations for many
known devices, which in combination with a wrapper script launched from the
udev daemon allows a fully automatic handling of a device upon insertion.

.SH "OPTIONS" 
.PP 
This program follows the usual GNU command line syntax,
with long options starting with two dashes ('--').  A summary of 
options is included below. 
.IP "\fB-h\fP \fB\-\-help\fP         " 10 
Show summary of options. 
.IP "\fB-e\fP \fB\-\-version\fP         " 10 
Print version information and exit. 
.IP "\fB-v\fP \fB\-\-default-vendor NUM\fP         " 10 
Vendor ID to look for (mandatory), usually given as hex number (example: 0x12d1).
Each USB device is identified by a number
officialy assigned to the vendor by the USB association and a number for the
respective model (product ID) chosen by the vendor
.IP "\fB-p\fP \fB\-\-default-product NUM\fP         " 10 
Product ID to look for (mandatory). 
.IP "\fB-V\fP \fB\-\-target-vendor NUM\fP         " 10 
Target vendor ID. When given will be searched for and detected initially
for information purposes. If success checking (option -s) is active, 
providing target IDs (vendor/product) or target class is recommended
.IP "\fB-P\fP \fB\-\-target-product NUM\fP         " 10 
Target product ID 
.IP "\fB-C\fP \fB\-\-target-class NUM\fP         " 10 
Target Device Class according to the USB specification. Some devices keep
their original vendor/product ID after successful switching. To prevent
them from being treated again, the device class can be checked.
For unswitched devices it is always 8 (storage class), for switched
modems it is often 0xff (vendor specific). In composite modes,
the class of the first interface is watched
.IP "\fB-m\fP \fB\-\-message-endpoint NUM\fP         " 10 
A specific endpoint to use for data transfers. Only for testing purposes; usually
endpoints are determined from the device attributes
.IP "\fB-M\fP \fB\-\-message-content STRING\fP         " 10 
A bulk message to send as a switching command. Provided as a hexadecimal string 
.IP "\fB-2, -3\fP  \fB\-\-message-content2, \-\-message-content3 STRING\fP         " 10 
Additional bulk messages to send as switching commands. Provided as hexadecimal strings.
When used with mass storage commands, setting \fB\-\-need-response\fR is
strongly advised to comply with specifications and to avoid likely errors
.IP "\fB-w\fP \fB\-\-message-delay NUM\fP         " 10
If there is more than one message content, wait for NUM milliseconds
before sending the next one. Otherwise it is ignored. Note: this will release
and reclaim the interface
.IP "\fB-n\fP \fB\-\-need-response\fP         " 10
Read the response (command status wrapper) to a mass storage command
transfer.
Some devices have trouble switching if the response is not read; most
are disappearing right away. When sending multiple mass storage commands
with \fB\-2\fR and \fB\-3\fR, this may need to be set to avoid transfer errors
.IP "\fB-r\fP \fB\-\-response-endpoint NUM\fP         " 10 
Try to read the response to a storage command from there
if option -n is active. Only for testing purposes; usually
endpoints are determined from the device attributes
.IP "\fB-d\fP \fB\-\-detach-only\fP         " 10
Detach the storage driver as the only action. This is sufficient for some
devices to switch successfully
.IP "\fB-H\fP \fB\-\-huawei-mode\fP         " 10 
Send a special control message used by older Huawei devices 
.IP "\fB-S\fP \fB\-\-sierra-mode\fP         " 10 
Send a special control message used by Sierra devices 
.IP "\fB-G\fP \fB\-\-gct-mode\fP         " 10 
Send a special control message used by GCT chipsets 
.IP "\fB-T\fP \fB\-\-kobil-mode\fP         " 10 
Send a special control message used by Kobil devices 
.IP "\fB-O\fP \fB\-\-sony-mode\fP         " 10 
Apply a special sequence used by Sony Ericsson devices. Implies option -s 
.IP "\fB-R\fP \fB\-\-reset-usb\fP         " 10 
Send a USB reset command to the device. Can be combined with any switching
method or stand alone. It is always done as the last step of all device
interactions.
Few devices need it to complete the switching; apart from that it may be
useful during testing
.IP "\fB-c\fP \fB\-\-config filename\fP         " 10 
Use a specific config file. If any ID or switching options are given as
command line parameters, this option is ignored.
In that case all mandatory parameters have to be provided on
the command line
.IP "\fB-Q\fP \fB\-\-quiet\fP         " 10 
Don't show progress or error messages 
.IP "\fB-W\fP \fB\-\-verbose\fP         " 10 
Print all settings before running and show libusb debug messages 
.IP "\fB-D\fP \fB\-\-sysmode\fP         " 10 
Changes the behaviour of the program slightly. A success message including the
effective target device ID is put out and a syslog notice is issued. Mainly for 
integration with a wrapper script
.IP "\fB-s\fP \fB\-\-success NUM\fP         " 10 
After switching, keep checking for the result up to max. NUM seconds. If target IDs
or target class were provided, their appearance indicates certain success. Otherwise
the disconnection of the original device is rated as likely proof
.IP "\fB-I\fP \fB\-\-no-inquire\fP         " 10 
do not obtain SCSI attributes from device (default is on). For proper identification
of differing devices the attributes of the storage part provide valuable information.
This is not needed for devices that are known and supported 
.IP "\fB-i\fP \fB\-\-interface NUM\fP         " 10 
Select initial USB interface (default: 0). Only for testing purposes
.IP "\fB-u\fP \fB\-\-configuration NUM\fP         " 10
Select USB configuration (applied after switching). Mainly for testing
.IP "\fB-a\fP \fB\-\-altsetting NUM\fP         " 10
Select alternative USB interface setting (applied after switching). Mainly
for testing
.SH "AUTHOR" 
.PP 
This manual page was originally written by Didier Raboud (didier@raboud.com) for 
the \fBDebian\fP system. Additions made by Josua Dietze. Permission is 
granted to copy, distribute and/or modify this document under 
the terms of the GNU General Public License, Version 2 or any 
later version published by the Free Software Foundation.

.PP
The complete text of the current GNU General Public
License can be found in http://www.gnu.org/licenses/gpl.txt

.\" last edited 2010-06-21
